#JavaScript (ES6), 30 bytes

+alert((({alert}+{alert}+{}))) 

Outputs [object Object][object Object][object Object].

Works by creating three objects:

• the first two are of the form { "alert" : alert } using ES6 notation {alert}

• the third is a simple empty object

Then it uses + to concatenate them together, and all three have an identical expression as a string, [object Object].

The leading + is useless, only present to fill out the number of + characters, but is harmless to the output of the program.

JavaScript (ES6), 30 bytes

+alert((({alert}+{alert}+{}))) 

Outputs [object Object][object Object][object Object].

Works by creating three objects:

• the first two are of the form { "alert" : alert } using ES6 notation {alert}

• the third is a simple empty object

Then it uses + to concatenate them together, and all three have an identical expression as a string, [object Object].

The leading + is useless, only present to fill out the number of + characters, but is harmless to the output of the program.

#JavaScript, 30 bytes

+alert((({alert}+{alert}+{}))) 

Outputs [object Object][object Object][object Object].

Works by creating three objects:

• the first two are of the form { "alert" : alert } using ES6 notation {alert}

• the third is a simple empty object

Then it uses + to concatenate them together, and all three have an identical expression as a string, [object Object].

The leading + is useless, only present to fill out the number of + characters, but is harmless to the output of the program.

#JavaScript (ES6), 30 bytes

+alert((({alert}+{alert}+{}))) 

Outputs [object Object][object Object][object Object].

Works by creating three objects:

• the first two are of the form { "alert" : alert } using ES6 notation {alert}

• the third is a simple empty object

Then it uses + to concatenate them together, and all three have an identical expression as a string, [object Object].

The leading + is useless, only present to fill out the number of + characters, but is harmless to the output of the program.

#JavaScript, 30 bytes

+alert((({alert}+{alert}+{}))) 

Outputs [object Object][object Object][object Object].

Works by creating three objects:

• the first two of the form { "alert" : alert } using ES6 notation

• the third a simple empty object

Then it uses + to concatenate them together, and all three have an identical expression as a string, [object Object].

The leading + is useless, only present to fill out the number of + characters, but is harmless to the output of the program.

#JavaScript, 30 bytes

+alert((({alert}+{alert}+{}))) 

Outputs [object Object][object Object][object Object].

Works by creating three objects:

• the first two are of the form { "alert" : alert } using ES6 notation {alert}

• the third is a simple empty object

Then it uses + to concatenate them together, and all three have an identical expression as a string, [object Object].

The leading + is useless, only present to fill out the number of + characters, but is harmless to the output of the program.